Rocker side bearing.



UNITED sTATEs PATENT oEEIoE. N

.Tor-IN r. oooNNon, or cI-Ircneo, ILLINoIs, AssIeNonTo WILLIAM H. MINER,or

CHAZY, NEW YonK.

nooxnn SIDE BEARING.

Application led April 1, 191B. Serial No. 225,885.

T0 all whom t may concern Be it known that I, JOHN F. QCoNNon, a citizenof the United States, residing at ,Chicago, in the county of lCook andState of Illinois, have invented a certain new and useful Improvement inRocker Side Bean ings, of which the following is a full, clear, concise,and exact description, reference being had to the accompanying drawings,forming a part of this specification.

This invention relates to improvements in rocker side bearings.

One object ofthe invention isto provide a relatively cheap rocker sidebearing suitable for railway cars, which side bearing includes a minimumnumber of parts and so designed that `the rocked will automaticallyreturn to normal osition after each actuation under the in uence ofgravity.

Another and more specific object of the invention is to provide larocker side bearing `of the type indicated so arranged that the rockerelement may be employed in any one of a plurality of positions so as tosuccessively present different sets of wearlng'surlfaces for the purposeof prolonging the life of the device.

In the drawingforming apart of this specification, Figure 1 is avertical, sectional view through portions of the body and truck bolstersof a railway car showing my improved side bearing in operative relationtherewith. The full section lines `ot the rocker indicate the normalposition of the latter and the dotted lines the position of the rockerat the end of its travel in one direction. Fig. 2 is a top plan view ofthe side bearing proper. And Fig. 3 is a vertical, sectional view, takensubstantially on 'the line 3-3 of Fig, 1.

In said drawing, 10 denotes the under side of abo'dy bolster ofa.railway ear and 11 the upper portion of an opposed truck bolster. Inthe drawing, the improved side ,bearing is shown attached lto the truckbolsters y The improved side bearing, as shown, 1n-

cludes two elements, a retaining `or base cast-V ing *A and a rocker oranti-friction element B.

The retaining member A is of substantially'hollow box-like form having abottom bearing wall 12, spaced "parallel side walls 13e-13, and"oppositely curved' end walls 111-44, the latter being adapted toSpecification of Letters Patent.

Patented Jan. *7, `191.9.

serve as limiting stops for the anti-friction in the form of a rocker ofpolygonal vertical cross section. In general outline, the rocker 1s moreor less triangular and 1s composed ot' three' sets of opposite,concentric, curved bearing surfaces. 16 and 116 of different radii. Thesurface 116 of each vseries is of relatively short radius and thecorresponding opposite curved concentric surface 16 is of relativelylong radius. As will be understood, each short radius surface 116 mergesinto tw@ bearing surfaces 16' of longer radius and disposed on each sidethereof, the whole effecting the general triangular formation abovereferred to. With the arrangement lof concentric surfaces of differentradii in series as abovefdescribed, it is evident that the rocker in:its movement from normal will maintain a fixed vertical distance betweenthe points of contact of the rocker with the opposed surfaces on the twoholsters. Furthermore, with the vrocker arranged as shown, it will beseen that it will automatically return to normal under the iniiuence ofgravity after each actuation and removal ofthe pressure.

In order to positively maint-ain the proper relation between the rockerand its retain ing casting, the latter is provided with a series ofspherical knobs 17-17 adapted to .coperate with corresponding recesses18 on all the Vsides of the rocker. In this manner, the rocker cannot beshifted bodily with respect to the retaining casting A.

In order to reduce the amount of metal in the rocker and also to insureproper and uniform cooling and annealing 'of the cast metal from whichthe rocker B is made, the same is preferably provided with a series oftransversely extending openings 19--19 and 20 symmetricallyarranged withregard to the center and surfaces of the rocker.

With the construction shown,` it 'is evident that any one of the seriesof opposed concentric surfaces 16 and 116 may 'be brought into action bymerely turning the rocker so as to present the desired surface 16 at thebottom and the corresponding sur' face 116 at the top. In this manner,the

- position .ofthe rocker, is changed topresent new surfaces for thepurpose of prolonging ablev and, as any surfaces become Worn, the

the life of the device.

The side Walls of the retaining member may be cut avvay, as indicated at21-21, to

. permit all foreign matter vto be readily vWashed out and thereby avoidinterference with the free movements of therocker.

. I claim:

l". Inya''side bearing of the character described, the combinationvvithl a retaining `memberjhavinga bearing seat, of a rocker t ofAgenerally polygonal cross section, said rocker havinga plurality ofseries of opposed concentric curved bearing faces of dif- 'ferent radii,one bearing face 3of each series 1 being adapted to rock on said bearingseat l and the opposed bearing face to engage an opposite member, theposition of said rocker as an entirety being shiftable with respect y toits retaining member so as to thereby utilizfeany '2a.

' yscribed, the combination with a retaining one ofthe series of opposedbearing faces. l

2. In a side bearing Iofthe character demember having a bearing seat, ofa rocker Y of generally polygonal cross section, said :56' rocker havinga plurality of series 'of 0pposed. concentric curved bearing' faces ofdiferenty radii, lonebearing face of each series. being adapted to rockon said bearing seat and the opposed bearing face to engagev an oppositemember, the position of said rocker as an entirety being shiftable withrespect toits retaining member so as to member after each actuation ofthe side bearing. .l

3. In a side bearing, the combination with a hollow box-like basecasting adapted to be Secured to a truck bolster, of a rocker ofsubstantially polygonal Vcross section mounted Within said base casting,said rocker lhaving a plurality of series of opposed concentric curvedbearing faces of different radii. 4

4. In a side'bearing, the combination with a hollow box-like basecasting adapted to be secured to la truck bolster, of a rockerofsubstantially polygonal cross section mounted Within said basecasting,l said rocker having a plurality of series of opposed concentriccurved bearing faces of different radii', said rocker being detachablymounted Within 'the base casting and adapted to have its position as anentirety changed with respect to the base casting so as to utilizeactively any one of'said series of I'concentric bearing faces.

In aside bearing of the character described, the combination with aretaining member, of a rocker of generally polygonal `cross section,said rocker having a plurality of series of concentric curved bearingsurfaces of different radii, any one of which series maybe utilizedactively, said retaining -member having a plurality of projections, andall surfaces of said rocker being provided with corresponding recessescooperable Wit-h said projections in any relative arrangement of saidrocker and retaining member.

In Witness that I claim thel foregoing I have hereunto subscribed myname this 27th day of Mar., 1918. I

JOHN F. OCONNOR.

